fix: update checker uses Gitea releases API instead of Tauri updater

The Tauri native updater needs update.json hosted at a static URL.
Gitea packages don't support a 'latest' alias, so the endpoint
returned 'package does not exist'. Reverted Settings and startup
check to use check_for_updates command which queries the Gitea
releases API directly and works reliably.

The native auto-updater will work once we have proper static hosting
for update.json (or a redirect endpoint). For now, the manual check
+ download page approach is functional.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/components/common/SettingsModal.vue

@@ -320,25 +320,7 @@ async function checkUpdates(): Promise<void> {
   updateChecking.value = true;
   updateInfo.value = null;
   try {
-    const { check } = await import("@tauri-apps/plugin-updater");
-    const update = await check();
-    if (update?.available) {
-      updateInfo.value = {
-        currentVersion: await getVersion(),
-        latestVersion: update.version || "unknown",
-        updateAvailable: true,
-        downloadUrl: "",
-        releaseNotes: update.body || "",
-      };
-    } else {
-      updateInfo.value = {
-        currentVersion: await getVersion(),
-        latestVersion: await getVersion(),
-        updateAvailable: false,
-        downloadUrl: "",
-        releaseNotes: "",
-      };
-    }
+    updateInfo.value = await invoke<UpdateCheckInfo>("check_for_updates");
   } catch (err) {
     alert(`Update check failed: ${err}`);
   }
@@ -346,16 +328,11 @@ async function checkUpdates(): Promise<void> {
 }
 
 async function downloadUpdate(): Promise<void> {
+  if (!updateInfo.value?.downloadUrl) return;
   try {
-    const { check } = await import("@tauri-apps/plugin-updater");
-    const update = await check();
-    if (update?.available) {
-      await update.downloadAndInstall();
-      const { relaunch } = await import("@tauri-apps/plugin-process");
-      await relaunch();
-    }
-  } catch (err) {
-    alert(`Update failed: ${err}`);
+    await shellOpen(updateInfo.value.downloadUrl);
+  } catch {
+    window.open(updateInfo.value.downloadUrl, "_blank");
   }
 }
 const currentVersion = ref("loading...");

src/layouts/MainLayout.vue

@@ -536,18 +536,15 @@ onMounted(async () => {
   } catch {}
 
   // Check for updates on startup via Tauri updater plugin (non-blocking)
-  import("@tauri-apps/plugin-updater").then(async ({ check }) => {
-    try {
-      const update = await check();
-      if (update?.available) {
-        if (confirm(`Wraith v${update.version} is available. Download and install?`)) {
-          await update.downloadAndInstall();
-          const { relaunch } = await import("@tauri-apps/plugin-process");
-          await relaunch();
+  invoke<{ currentVersion: string; latestVersion: string; updateAvailable: boolean; downloadUrl: string }>("check_for_updates")
+    .then((info) => {
+      if (info.updateAvailable) {
+        if (confirm(`Wraith v${info.latestVersion} is available (you have v${info.currentVersion}). Open download page?`)) {
+          import("@tauri-apps/plugin-shell").then(({ open }) => open(info.downloadUrl)).catch(() => window.open(info.downloadUrl, "_blank"));
         }
       }
-    } catch {}
-  }).catch(() => {});
+    })
+    .catch(() => {});
 });
 
 onUnmounted(() => {